Our solid wheeled backpack features industrial strength PVC, a tough base to hold the bag upright, and high quality zippers. A padded back sleeve holds the straps of the backpack while using the wheels or it can be closed over the wheels when carrying the bag as a backpack. The large main compartment has room to carry anything from schoolbooks and binders to clothes and other items. The ergonomic design of our three-point support system has curved padded shoulder straps that evenly distribute the weight of the backpack on your body. Our revised model features a zippered phone pocket on one side and a mesh bottle pocket on the other and comes in 4 exciting colors.